A comprehensive critique of the investigators’ approach would have described the evidence they chose not to weigh. That would have been consistent with other parts of the report, in which Horowitz dilates on the minutiae of investigative techniques the agents and prosecutors eschewed.

A detailed description of the grossly improper communications system Clinton established would have illustrated that she knew full well the risk she was running. A large percentage of the secretary of state’s job involves classified matters. We are not talking merely about the exchange of documents marked classified but, more commonly, constant deliberations about sensitive intelligence in classified documents, briefings, and conversations. Clinton’s willful concoction of a home-brew communications network — not a harried official’s occasional, exigent use of private email for official business, but her rogue institution of a private, non-government infrastructure for the systematic conduct of State Department business — made the non-secure transmission and storage of classified information inevitable.